Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt...
[pandora-kernel.git] / drivers / gpu / drm / i915 / intel_fb.c
1 /*
2  * Copyright © 2007 David Airlie
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *     David Airlie
25  */
26
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/errno.h>
30 #include <linux/string.h>
31 #include <linux/mm.h>
32 #include <linux/tty.h>
33 #include <linux/sysrq.h>
34 #include <linux/delay.h>
35 #include <linux/fb.h>
36 #include <linux/init.h>
37 #include <linux/vga_switcheroo.h>
38
39 #include "drmP.h"
40 #include "drm.h"
41 #include "drm_crtc.h"
42 #include "drm_fb_helper.h"
43 #include "intel_drv.h"
44 #include "i915_drm.h"
45 #include "i915_drv.h"
46
47 struct intelfb_par {
48         struct drm_fb_helper helper;
49         struct intel_framebuffer *intel_fb;
50         struct drm_display_mode *our_mode;
51 };
52
53 static struct fb_ops intelfb_ops = {
54         .owner = THIS_MODULE,
55         .fb_check_var = drm_fb_helper_check_var,
56         .fb_set_par = drm_fb_helper_set_par,
57         .fb_setcolreg = drm_fb_helper_setcolreg,
58         .fb_fillrect = cfb_fillrect,
59         .fb_copyarea = cfb_copyarea,
60         .fb_imageblit = cfb_imageblit,
61         .fb_pan_display = drm_fb_helper_pan_display,
62         .fb_blank = drm_fb_helper_blank,
63         .fb_setcmap = drm_fb_helper_setcmap,
64 };
65
66 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
67         .gamma_set = intel_crtc_fb_gamma_set,
68         .gamma_get = intel_crtc_fb_gamma_get,
69 };
70
71
72 /**
73  * Currently it is assumed that the old framebuffer is reused.
74  *
75  * LOCKING
76  * caller should hold the mode config lock.
77  *
78  */
79 int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
80 {
81         struct fb_info *info;
82         struct drm_framebuffer *fb;
83         struct drm_display_mode *mode = crtc->desired_mode;
84
85         fb = crtc->fb;
86         if (!fb)
87                 return 1;
88
89         info = fb->fbdev;
90         if (!info)
91                 return 1;
92
93         if (!mode)
94                 return 1;
95
96         info->var.xres = mode->hdisplay;
97         info->var.right_margin = mode->hsync_start - mode->hdisplay;
98         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
99         info->var.left_margin = mode->htotal - mode->hsync_end;
100         info->var.yres = mode->vdisplay;
101         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
102         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
103         info->var.upper_margin = mode->vtotal - mode->vsync_end;
104         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
105         /* avoid overflow */
106         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
107
108         return 0;
109 }
110 EXPORT_SYMBOL(intelfb_resize);
111
112 static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
113                           uint32_t fb_height, uint32_t surface_width,
114                           uint32_t surface_height,
115                           uint32_t surface_depth, uint32_t surface_bpp,
116                           struct drm_framebuffer **fb_p)
117 {
118         struct fb_info *info;
119         struct intelfb_par *par;
120         struct drm_framebuffer *fb;
121         struct intel_framebuffer *intel_fb;
122         struct drm_mode_fb_cmd mode_cmd;
123         struct drm_gem_object *fbo = NULL;
124         struct drm_i915_gem_object *obj_priv;
125         struct device *device = &dev->pdev->dev;
126         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
127
128         /* we don't do packed 24bpp */
129         if (surface_bpp == 24)
130                 surface_bpp = 32;
131
132         mode_cmd.width = surface_width;
133         mode_cmd.height = surface_height;
134
135         mode_cmd.bpp = surface_bpp;
136         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
137         mode_cmd.depth = surface_depth;
138
139         size = mode_cmd.pitch * mode_cmd.height;
140         size = ALIGN(size, PAGE_SIZE);
141         fbo = drm_gem_object_alloc(dev, size);
142         if (!fbo) {
143                 DRM_ERROR("failed to allocate framebuffer\n");
144                 ret = -ENOMEM;
145                 goto out;
146         }
147         obj_priv = to_intel_bo(fbo);
148
149         mutex_lock(&dev->struct_mutex);
150
151         ret = i915_gem_object_pin(fbo, 64*1024);
152         if (ret) {
153                 DRM_ERROR("failed to pin fb: %d\n", ret);
154                 goto out_unref;
155         }
156
157         /* Flush everything out, we'll be doing GTT only from now on */
158         i915_gem_object_set_to_gtt_domain(fbo, 1);
159
160         ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
161         if (ret) {
162                 DRM_ERROR("failed to allocate fb.\n");
163                 goto out_unpin;
164         }
165
166         list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
167
168         intel_fb = to_intel_framebuffer(fb);
169         *fb_p = fb;
170
171         info = framebuffer_alloc(sizeof(struct intelfb_par), device);
172         if (!info) {
173                 ret = -ENOMEM;
174                 goto out_unpin;
175         }
176
177         par = info->par;
178
179         par->helper.funcs = &intel_fb_helper_funcs;
180         par->helper.dev = dev;
181         ret = drm_fb_helper_init_crtc_count(&par->helper, 2,
182                                             INTELFB_CONN_LIMIT);
183         if (ret)
184                 goto out_unref;
185
186         strcpy(info->fix.id, "inteldrmfb");
187
188         info->flags = FBINFO_DEFAULT;
189
190         info->fbops = &intelfb_ops;
191
192
193         /* setup aperture base/size for vesafb takeover */
194         info->aperture_base = dev->mode_config.fb_base;
195         if (IS_I9XX(dev))
196                 info->aperture_size = pci_resource_len(dev->pdev, 2);
197         else
198                 info->aperture_size = pci_resource_len(dev->pdev, 0);
199
200         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
201         info->fix.smem_len = size;
202
203         info->flags = FBINFO_DEFAULT;
204
205         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
206                                        size);
207         if (!info->screen_base) {
208                 ret = -ENOSPC;
209                 goto out_unpin;
210         }
211         info->screen_size = size;
212
213 //      memset(info->screen_base, 0, size);
214
215         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
216         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
217
218         /* FIXME: we really shouldn't expose mmio space at all */
219         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
220         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
221
222         info->pixmap.size = 64*1024;
223         info->pixmap.buf_align = 8;
224         info->pixmap.access_align = 32;
225         info->pixmap.flags = FB_PIXMAP_SYSTEM;
226         info->pixmap.scan_align = 1;
227
228         fb->fbdev = info;
229
230         par->intel_fb = intel_fb;
231
232         /* To allow resizeing without swapping buffers */
233         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
234                         intel_fb->base.width, intel_fb->base.height,
235                         obj_priv->gtt_offset, fbo);
236
237         mutex_unlock(&dev->struct_mutex);
238         vga_switcheroo_client_fb_set(dev->pdev, info);
239         return 0;
240
241 out_unpin:
242         i915_gem_object_unpin(fbo);
243 out_unref:
244         drm_gem_object_unreference(fbo);
245         mutex_unlock(&dev->struct_mutex);
246 out:
247         return ret;
248 }
249
250 int intelfb_probe(struct drm_device *dev)
251 {
252         int ret;
253
254         DRM_DEBUG_KMS("\n");
255         ret = drm_fb_helper_single_fb_probe(dev, 32, intelfb_create);
256         return ret;
257 }
258 EXPORT_SYMBOL(intelfb_probe);
259
260 int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
261 {
262         struct fb_info *info;
263
264         if (!fb)
265                 return -EINVAL;
266
267         info = fb->fbdev;
268
269         if (info) {
270                 struct intelfb_par *par = info->par;
271                 unregister_framebuffer(info);
272                 iounmap(info->screen_base);
273                 if (info->par)
274                         drm_fb_helper_free(&par->helper);
275                 framebuffer_release(info);
276         }
277
278         return 0;
279 }
280 EXPORT_SYMBOL(intelfb_remove);
281 MODULE_LICENSE("GPL and additional rights");